1. Institute of Organic Chemistry and Biochemistry; Academy of Sciences of the Czech Republic; v.v.i., Flemingovo náměstí 2; 166 10; Prague 6; Czech Republic
2. Department of Agro-Environmental Chemistry and Plant Nutrition; Faculty of Agrobiology, Food and Natural Resources; Czech University of Life Sciences; Kamýcká 129; 165 21; Prague; Suchdol; Czech Republic